USGS Open-File Report 00-515
Chloride Concentration in Water from the Floridan Aquifer System
Brunswick Area
Since pumping began in the Brunswick area in the late 1800's, ground-water withdrawal has lowered the water level in the Upper Floridan aquifer (Krause and Randolph, 1989). This water-level decline has allowed saltwater to migrate upward into the brackish-water zone of the Lower Floridan aquifer and into the Upper Floridan aquifer in Brunswick from the Fernandina permeable zone, which is at the base of the Lower Floridan aquifer (Krause and Randolph, 1989, p. D51). Chloride concentration in water from the upper water-bearing zone of the Upper Floridan aquifer is greater than 2,000 mg/L in parts of Brunswick.
In the Brunswick area, 71 wells were pumped and sampled during 1999 for chloride analysis. Graphs of chloride concentration in water from eight wells (fig. 154) tapping various zones of the Floridan aquifer system are shown below.
Figure 154. Location of chloride-monitoring wells completed in the Floridan aquifer system, Brunswick area
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Last updated Monday, 26-Jun-2000 15:14:17 EDT
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